It does seem to be ship specific. When we were on the Journey in June, the muster required us all to report to our muster stations A/B en masse before sailing. We got off the Pursuit yesterday in Oslo and when we boarded in Dublin at the end of July, we were played a video in the cabaret lounge in small groups after we had completed check-in in the cabaret lounge, regardless of muster station. I much prefer the Pursuit approach and hope they standardize this way.